John Glenn, the first American astronaut to orbit the Earth, died Thursday at the age of 95. Celebrities are now reacting to the death of the legendary spaceman. See stars’ tweets, tributes and reactions here.

Fidel Castro died late Friday, a full nine years, three months and one day after Perez Hilton first reported the Cuban dictator’s death. Castro was 90 years old. The news of the Communist leader’s actual death was officially announced by his brother Raul on Cuban TV.

Gwen Ifill, a longtime PBS journalist and television host, died Monday after a months-long battle with cancer. She was 61. Celebrities are now reacting on Twitter to the death of the newswoman. See stars tributes here.